Improvement in door-fasteners



UNITED STATES PATENT OEEIGEo JAMES BLAKE, 0F EAST PEPPERELL,MASSACHUSETTS.

IMPROVEMENT IN DOOR-FASTENERS.

Specification forming part of Letters Patent N o. 155,410, datedSeptember 29, 1874; anplieation tiled Apri125, 1874.

To all lwhom it may concern Be it known that I, JAMES BLAKE, of EastPepperell, in the county of Middlesex and State of Massachusetts, haveinvented a new and Improved Door-Fastening, of which the following is aspecification:

In the accompanying drawing, Figure l represents a horizontal centralsection of my improved door-I'astening as applied to the door andcasing, and Fig. 2 is an end view of the bolt and face-plate.

Similar letters of reference indicate corresponding parts.

The object of my invention is to provide a door-fastening by whichwarped or shrunk doors may be readily closed, and also the door carriedinto its proper place when nearly shut, and then securely latched.

My invention consists of a spring-bolt with projecting roller end, whichslides in a socket set into the door, and fastens the door by means ofan angular plate with suitable inclines applied to the casing. A catchof the socket face-plate projects into a recess of the spring-bolt, andretains the same inside of the socket during the time the door is open.

In the drawing, A represents the door, which is provided with a recess,a, for socket B, or other equivalent means for guiding the springbolt Ctherein. A spiral spring, b, is placed around the guide-stern of thebolt or piston C, between the broader forward projecting end of the sameand the closed end of the socket, forcing thereby the bolt in outwarddirection until arrested by the nut or stop d at the rear end of thestein. The face-plate e of socket B is firmly screwed to the door, andprovided with a projecting catch, f, which enters a correspondingrecess, f, of the bolt near its outer end, for retaining the same in thesocket when placed over the catch. A small roller, C', is

' pivoted to the outer end of bolt C, for decreasing the friction on theangular' plate g, which is set into a recess, g', of the door frame orcasing. The angular plate forms two inclines, of which the outer isshorter than the inner, having also a greater inclination. The endroller of the bolt passes along the angular plate on closing the door,and releases, by running over the shorter incline, the bolt from itscatch. After the highest point of the inclines is reached the rollerpasses over to the longer incline, and draws, by the action of thespring ou the bolt, the door forward until the lowermost point of theangular plate is reached. The door is then tightly closed, and locked bythe spring-bolt, whether the same is warped, shrunk, or otherwise out ofshape.

On opening the door, the bolt is carried back into the socket by runningalong the inner inclined part of the plate, and is seated on the catchas soon as the highest point or apex is passed, so that the end of thebolt is not in the way, and ready to be released on closing. Thus asimple,strong, and very secure doorfastening is obtained.

Having thus described my invention,I claim as new and desire to secureby Letters Patentl. The combination, with the spring-bolt C and rollerC', of the angular plate g, having two reversely-inclined surfaces, thevarious parts being relatively arranged, in respect to the door andcasing, as herein shown, to operate in the manner set forth.

2. The door face-plate c, having a projecting catch, f, in combinationwith recess j" of springbolt C, to retain the same in position in thedoor until released by the action of the inclined parts of the angularplate g, as described.

JAMES BLAKE.

Witnesses:

IDA A. BLAKE, LOUISE E. BLAKE.

